<template>
    <div class="app-container">
        <el-scrollbar wrap-class="scrollbar-wrapper">
            <div class="full">
                <div class="filter-container">
                    <el-input v-model="listQuery.title" placeholder="Title" style="width: 200px;" class="filter-item"
                        @keyup.enter.native="handleFilter" />
                    <el-select v-model="listQuery.importance" placeholder="Imp" clearable style="width: 90px" class="filter-item">
                        <el-option v-for="item in importanceOptions" :key="item" :label="item" :value="item" />
                    </el-select>
                    <el-select v-model="listQuery.type" placeholder="Type" clearable class="filter-item" style="width: 130px">
                        <el-option v-for="item in calendarTypeOptions" :key="item.key" :label="item.display_name+'('+item.key+')'"
                            :value="item.key" />
                    </el-select>
                    <el-select v-model="listQuery.sort" style="width: 140px" class="filter-item" @change="handleFilter">
                        <el-option v-for="item in sortOptions" :key="item.key" :label="item.label" :value="item.key" />
                    </el-select>
                    <el-button v-waves class="filter-item" type="primary" icon="el-icon-search" @click="handleFilter">
                        Search
                    </el-button>
                    <el-button class="filter-item" style="margin-left: 10px;" type="primary" icon="el-icon-edit" @click="handleCreate">
                        Add
                    </el-button>
                    <el-button v-waves :loading="downloadLoading" class="filter-item" type="primary" icon="el-icon-download"
                        @click="handleDownload">
                        Export
                    </el-button>
                    <el-checkbox v-model="showReviewer" class="filter-item" style="margin-left:15px;" @change="tableKey=tableKey+1">
                        reviewer
                    </el-checkbox>
                </div>

                <el-table :key="tableKey" v-loading="listLoading" :data="list" border fit highlight-current-row style="width: 100%;"
                    @sort-change="sortChange">
                    <el-table-column label="ID" prop="id" sortable="custom" align="center" width="80" :class-name="getSortClass('id')">
                        <template slot-scope="{row}">
                            <span>{{ row.id }}</span>
                        </template>
                    </el-table-column>
                    <el-table-column label="Date" width="150px" align="center">
                        <template slot-scope="{row}">
                            <span>{{ row.timestamp | parseTime('{y}-{m}-{d} {h}:{i}') }}</span>
                        </template>
                    </el-table-column>
                    <el-table-column label="Title" min-width="150px">
                        <template slot-scope="{row}">
                            <span class="link-type" @click="handleUpdate(row)">{{ row.title }}</span>
                            <el-tag>{{ row.type | typeFilter }}</el-tag>
                        </template>
                    </el-table-column>
                    <el-table-column label="Author" width="110px" align="center">
                        <template slot-scope="{row}">
                            <span>{{ row.author }}</span>
                        </template>
                    </el-table-column>
                    <el-table-column v-if="showReviewer" label="Reviewer" width="110px" align="center">
                        <template slot-scope="{row}">
                            <span style="color:red;">{{ row.reviewer }}</span>
                        </template>
                    </el-table-column>
                    <el-table-column label="Imp" width="80px">
                        <template slot-scope="{row}">
                            <svg-icon v-for="n in + row.importance" :key="n" icon-class="star" class="meta-item__icon" />
                        </template>
                    </el-table-column>
                    <el-table-column label="Readings" align="center" width="95">
                        <template slot-scope="{row}">
                            <span v-if="row.pageviews" class="link-type" @click="handleFetchPv(row.pageviews)">{{ row.pageviews }}</span>
                            <span v-else>0</span>
                        </template>
                    </el-table-column>
                    <el-table-column label="Status" class-name="status-col" width="100">
                        <template slot-scope="{row}">
                            <el-tag :type="row.status | statusFilter">
                                {{ row.status }}
                            </el-tag>
                        </template>
                    </el-table-column>
                    <el-table-column label="Actions" align="center" width="230" class-name="small-padding fixed-width">
                        <template slot-scope="{row,$index}">
                            <el-button type="primary" size="mini" @click="handleUpdate(row)">
                                编辑
                            </el-button>
                            <el-button v-if="row.status!='published'" size="mini" type="success"
                                @click="handleModifyStatus(row,'published')">
                                发布
                            </el-button>
                            <el-button v-if="row.status!='draft'" size="mini" @click="handleModifyStatus(row,'draft')">
                                选中
                            </el-button>
                            <el-button v-if="row.status!='deleted'" size="mini" type="danger" @click="handleDelete(row,$index)">
                                删除
                            </el-button>
                        </template>
                    </el-table-column>
                </el-table>

                <pagination v-show="total>0" :total="total" :page.sync="listQuery.page" :limit.sync="listQuery.limit"
                    @pagination="getList" />

                <el-dialog :title="textMap[dialogStatus]" :visible.sync="dialogFormVisible">
                    <el-form ref="dataForm" :rules="rules" :model="temp" label-position="left" label-width="70px"
                        style="width: 400px; margin-left:50px;">
                        <el-form-item label="Type" prop="type">
                            <el-select v-model="temp.type" class="filter-item" placeholder="Please select">
                                <el-option v-for="item in calendarTypeOptions" :key="item.key" :label="item.display_name"
                                    :value="item.key" />
                            </el-select>
                        </el-form-item>
                        <el-form-item label="Date" prop="timestamp">
                            <el-date-picker v-model="temp.timestamp" type="datetime" placeholder="Please pick a date" />
                        </el-form-item>
                        <el-form-item label="Title" prop="title">
                            <el-input v-model="temp.title" />
                        </el-form-item>
                        <el-form-item label="Status">
                            <el-select v-model="temp.status" class="filter-item" placeholder="Please select">
                                <el-option v-for="item in statusOptions" :key="item" :label="item" :value="item" />
                            </el-select>
                        </el-form-item>
                        <el-form-item label="Imp">
                            <el-rate v-model="temp.importance" :colors="['#99A9BF', '#F7BA2A', '#FF9900']" :max="3"
                                style="margin-top:8px;" />
                        </el-form-item>
                        <el-form-item label="Remark">
                            <el-input v-model="temp.remark" :autosize="{ minRows: 2, maxRows: 4}" type="textarea"
                                placeholder="Please input" />
                        </el-form-item>
                    </el-form>
                    <div slot="footer" class="dialog-footer">
                        <el-button @click="dialogFormVisible = false">
                            取消
                        </el-button>
                        <el-button type="primary" @click="dialogStatus==='create'?createData():updateData()">
                            确认
                        </el-button>
                    </div>
                </el-dialog>

                <el-dialog :visible.sync="dialogPvVisible" title="读取数据">
                    <el-table :data="pvData" border fit highlight-current-row style="width: 100%">
                        <el-table-column prop="key" label="Channel" />
                        <el-table-column prop="pv" label="Pv" />
                    </el-table>
                    <span slot="footer" class="dialog-footer">
                        <el-button type="primary" @click="dialogPvVisible = false">Confirm</el-button>
                    </span>
                </el-dialog>
            </div>
        </el-scrollbar>
    </div>
</template>

<script>
import { fetchList, fetchPv, createArticle, updateArticle } from '@/api/article'
import waves from '@/directive/waves' // waves directive
import { parseTime } from '@/utils'
import Pagination from '@/components/Pagination' // secondary package based on el-pagination

const calendarTypeOptions = [
    { key: 'CN', display_name: 'China' },
    { key: 'US', display_name: 'USA' },
    { key: 'JP', display_name: 'Japan' },
    { key: 'EU', display_name: 'Eurozone' }
]

// arr to obj, such as { CN : "China", US : "USA" }
const calendarTypeKeyValue = calendarTypeOptions.reduce((acc, cur) => {
    acc[cur.key] = cur.display_name
    return acc
}, {})

export default {
    name: 'ComplexTable',
    components: { Pagination },
    directives: { waves },
    filters: {
        statusFilter (status) {
            const statusMap = {
                published: 'success',
                draft: 'info',
                deleted: 'danger'
            }
            return statusMap[status]
        },
        typeFilter (type) {
            return calendarTypeKeyValue[type]
        }
    },
    data () {
        return {
            tableKey: 0,
            list: null,
            total: 0,
            listLoading: true,
            listQuery: {
                page: 1,
                limit: 20,
                importance: undefined,
                title: undefined,
                type: undefined,
                sort: '+id'
            },
            importanceOptions: [1, 2, 3],
            calendarTypeOptions,
            sortOptions: [{ label: 'ID Ascending', key: '+id' }, { label: 'ID Descending', key: '-id' }],
            statusOptions: ['published', 'draft', 'deleted'],
            showReviewer: false,
            temp: {
                id: undefined,
                importance: 1,
                remark: '',
                timestamp: new Date(),
                title: '',
                type: '',
                status: 'published'
            },
            dialogFormVisible: false,
            dialogStatus: '',
            textMap: {
                update: 'Edit',
                create: 'Create'
            },
            dialogPvVisible: false,
            pvData: [],
            rules: {
                type: [{ required: true, message: 'type is required', trigger: 'change' }],
                timestamp: [{ type: 'date', required: true, message: 'timestamp is required', trigger: 'change' }],
                title: [{ required: true, message: 'title is required', trigger: 'blur' }]
            },
            downloadLoading: false
        }
    },
    created () {
        this.getList()
    },
    methods: {
        getList () {
            this.listLoading = true
            fetchList(this.listQuery).then(response => {
                this.list = response.data.items
                this.total = response.data.total

                // Just to simulate the time of the request
                setTimeout(() => {
                    this.listLoading = false
                }, 1.5 * 1000)
            })
        },
        handleFilter () {
            this.listQuery.page = 1
            this.getList()
        },
        handleModifyStatus (row, status) {
            this.$message({
                message: '操作Success',
                type: 'success'
            })
            row.status = status
        },
        sortChange (data) {
            const { prop, order } = data
            if (prop === 'id') {
                this.sortByID(order)
            }
        },
        sortByID (order) {
            if (order === 'ascending') {
                this.listQuery.sort = '+id'
            } else {
                this.listQuery.sort = '-id'
            }
            this.handleFilter()
        },
        resetTemp () {
            this.temp = {
                id: undefined,
                importance: 1,
                remark: '',
                timestamp: new Date(),
                title: '',
                status: 'published',
                type: ''
            }
        },
        handleCreate () {
            this.resetTemp()
            this.dialogStatus = 'create'
            this.dialogFormVisible = true
            this.$nextTick(() => {
                this.$refs['dataForm'].clearValidate()
            })
        },
        createData () {
            this.$refs['dataForm'].validate((valid) => {
                if (valid) {
                    this.temp.id = parseInt(Math.random() * 100) + 1024 // mock a id
                    this.temp.author = 'vue-element-admin'
                    createArticle(this.temp).then(() => {
                        this.list.unshift(this.temp)
                        this.dialogFormVisible = false
                        this.$notify({
                            title: 'Success',
                            message: 'Created Successfully',
                            type: 'success',
                            duration: 2000
                        })
                    })
                }
            })
        },
        handleUpdate (row) {
            this.temp = Object.assign({}, row) // copy obj
            this.temp.timestamp = new Date(this.temp.timestamp)
            this.dialogStatus = 'update'
            this.dialogFormVisible = true
            this.$nextTick(() => {
                this.$refs['dataForm'].clearValidate()
            })
        },
        updateData () {
            this.$refs['dataForm'].validate((valid) => {
                if (valid) {
                    const tempData = Object.assign({}, this.temp)
                    tempData.timestamp = +new Date(tempData.timestamp) // change Thu Nov 30 2017 16:41:05 GMT+0800 (CST) to 1512031311464
                    updateArticle(tempData).then(() => {
                        const index = this.list.findIndex(v => v.id === this.temp.id)
                        this.list.splice(index, 1, this.temp)
                        this.dialogFormVisible = false
                        this.$notify({
                            title: 'Success',
                            message: 'Update Successfully',
                            type: 'success',
                            duration: 2000
                        })
                    })
                }
            })
        },
        handleDelete (row, index) {
            this.$notify({
                title: 'Success',
                message: 'Delete Successfully',
                type: 'success',
                duration: 2000
            })
            this.list.splice(index, 1)
        },
        handleFetchPv (pv) {
            fetchPv(pv).then(response => {
                this.pvData = response.data.pvData
                this.dialogPvVisible = true
            })
        },
        handleDownload () {
            this.downloadLoading = true
            import('@/vendor/Export2Excel').then(excel => {
                const tHeader = ['timestamp', 'title', 'type', 'importance', 'status']
                const filterVal = ['timestamp', 'title', 'type', 'importance', 'status']
                const data = this.formatJson(filterVal)
                excel.export_json_to_excel({
                    header: tHeader,
                    data,
                    filename: 'table-list'
                })
                this.downloadLoading = false
            })
        },
        formatJson (filterVal) {
            return this.list.map(v => filterVal.map(j => {
                if (j === 'timestamp') {
                    return parseTime(v[j])
                } else {
                    return v[j]
                }
            }))
        },
        getSortClass: function (key) {
            const sort = this.listQuery.sort
            return sort === `+${key}` ? 'ascending' : 'descending'
        }
    }
}
</script>
